Junos OS: MX Series: uncontrolled recursion and crash in Broadband Edge subscriber management daemon (bbe-smgd).

published 2019-01-15 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-0808

cvss: 7.5; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.0%; EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits: 0; none known

Receipt of a malformed packet on MX Series devices with dynamic vlan configuration can trigger an uncontrolled recursion loop in the Broadband Edge subscriber management daemon (bbe-smgd), and lead to high CPU usage and a crash of the bbe-smgd service. Repeated receipt of the same packet can result in an extended denial of service condition for the device. Affected releases are Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S1; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R3; 17.3 versions prior to 17.3R3-S1; 17.4 versions prior to 17.4R2; 18.1 versions prior to 18.1R3; 18.2 versions prior to 18.2R2.

Patch / fix

fixed in 1

Juniper Networks Junos OS 16.1R7-S1, 16.2R2-S7, 17.1R2-S10, 17.1R3, 17.2R3, 17.3R3-S1, 17.4R2, 18.1R3, 18.2R2

Exploit prediction

3.05% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	7.1	AV:N/AC:M/Au:N/C:N/I:N/A:C

Affected products

Juniper Networks Junos OS

Classification

Weakness

CWE-674 Uncontrolled Recursion

References

lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/RMKFSHPMOZL7MDWU5RYOTIBTRWSZ4Z6X/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/W7CPKBW4QZ4VIY4UXIUVUSHRJ4R2FROE/
vendor-advisory
kb.juniper.net /JSA10900
vendor-advisory
securityfocus.com /bid/106541
vdb-entry, third-party-advisory

Sources

CVE List CVE-2019-0001
NVD CVE-2019-0001

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary